Mold-pattern for stove-lids.



W. H. TAPHORN. MOLD PATTERN FOR STOVE LIDS. APPLICATION FILED 11017.16,1909.

9 1 93; v Patented Jan.17,1911.

THE NORRIS PETERS ca wnsnmc-rau, n. c,

Unrrn WILLIAM H. TAPHORN, OF BELLEVILLE, ILLINOIS.

MOLD-PATTERN FOR STOVE-LIBS.

Specification of Letters Patent.

Application filed November 16, 1909.

Patented Jan..17, 1911. Serial No. 528,289.

To all whom it may concern:

Be it known that I, VVILLIAM HENRY TAP- HORN, a citizen of the UnitedStates, residing at Belleville, in the county of St. Clair and State ofIllinois, have invented certain new and useful Improvements inMold-Patterns for Stove-Lids, of which the following is a specification,reference being had to the accompanying drawings.

My invention relates to improvements in mold patterns for stove-lids;and an object of my invention is to provide a mold pattern of thecharacter described which will consist of a unitary structure comprisinga matchplate, a cover pattern and means for forming in the mold the twoholes for the production of the lips for the stove-lid lifter in thefinished casting, the match-plate serving to carry the other parts.

Another object of my invention is to provide a mold pattern of the typeabove defined which will permit the workman to produce a better mold inless time than is possible with devices heretofore known and thereby tocheapen the product-ion of the finished article,the stove-lid.

In the drawings illustrating the principle of my invention and the bestmode now known .to me of applying that principle, Figure l is a plan ofthe back or rear face of my new mold pattern, a portion of one edgebeing shown broken away for economy of space; Fig. 2 is a plan of thefront or working side of my new mold pattern, a portion of the coverpattern being shown broken away for the sake of clearness and to exposethe parts beneath the cover pattern; and Fig. 3 is a section on the lineAA of Fig. 2.

In the top or front face of the match-plate a are formed a circulargroove 6, a groove 0 which forms a part of a circle concentric with thegroove 1) and a depression or recess d at the lateral walls of whichterminate the ends of the inner groove 0. The walls of the cavity 03project from the back of the matchplate and form a sort of boss which isadapted to produce in the mold the sink of the cover or lid (Figs. 1 and3). The cover pat tern e is formed with a circumferential flange f atits edge and with a curved rib g shaped to fit the inner groove 0. Theflange f fits in the outer groove 5. The cover pat tern c then liesflush with the front face of the match-plate (Fig. 3) and is formed witha pocket or depression, 72, sometimes called a Sink the Walls of whichproject from the bottom face of the cover pattern to form a sort ofshell and fit snugly in the cavity at formed in the top of thematch-plate a. To fasten the cover pattern to the latter, screws 2' arepassed through holes in the cover pattern into screwholes or threadedholes in the match-plate. The rear or back face of the latter is formedwith a circular rib or flange m which serves to produce in the mold theflange which in the cover casting corresponds with the flange f.

In the top of the match-plate a are formed a pair of channels orguideways j which are in line with each other and the inner opposed endsof which communicate with the recess (Z. Formed in the top of thematchplate a and communicating each with one of the guideways j are apair of recesses or notches is which are V-shaped. In each side wall orlateral wall of the sink or recess h is formed a hole m which, when thecover pattern is fitted in place on the match plate a, is in line withthe inner end of one of the guideways 7'. In each of the latter ismounted a plunger 11, formed with a notch 0 into which extends one endof a leaf spring 10 the other end of which is anchored in the matchplatea near the apex of the V-shaped recess or notch 70. Each plunger ncarries a pin 9 the free end of which extends through a slot 1" formedin the match-plate a and projects from the bottom or back of the latterto form a fingerhold. A small disk or button 8 is mounted on each pin 9and serves to cover the slot 1".

The cover pattern being secured in place upon the match-plate, in whichposition the top face of the former will be flush or level with the sameface of the latter, my new mold pattern is placed in molding sand in aflask with the cover pattern face down and the pins 51 projecting upwardso as to be accessible to the workman, when the time to operate themarrives. The top of the flask or cope is then put in place and moldingsand is thoroughly tamped around the pat tern in the usual way in makingmolds practiced today. The upper part or cope of the flask is removed,thereby exposing the projecting ends of the pins 9 to view. It will beunderstood that the sink or depression k in the cover pattern 6 is atthis time filled with thoroughly tamped molding sand. Using theprojecting ends of the pins Q as fingerholds, the Workman presses thepins 9 toward each other and thereby forces the opposed ends of theplungers or slides n toward each other through the holes m, in the sideWalls or lateral walls of the recess or sink h. It will be understoodthat the shape of the ends of the plungers n is like that of the lips tobe formed on the stove-lid or stove cover and that the contour of theholes m is such as to permit these plunger ends to move there throughwith a sliding fit. The pins 9 drive the plunger ends into the sandcompacted in the sink h and, when the pressure upon the pins Q isremoved, the leaf springs 29 carry the plungers 12 back into theguideways or channels to their initial ororiginal positions. Thewi'tl'idrawal of the plunger ends causes cavitiesto be left in thecompressed sand in the sink h, into which cavities flows the metal toform the lips or ears for the engagement of the stove-lid lifter. Themold pattern is now removed and the cope is replaced, after which theordinary operations of founding or casting are performed in a mannerwell known to all skilled in that art.

I claim:

A mold pattern of thecharacter described, consisting of a match-plateformed on one face with a rib or flange and having in its opposite facea depression and a cavity, the walls of the latter projecting from thefirstnamed face; a cover pattern mounted in said depression with itsouter face flush with the last-named face and formed with a sink thewalls of which fit in said cavity, the sidewalls of said sink being eachformed with an opening; a pair of plungers mounted between said coverpatt-ern and match-plate and adapted to be forced outwardly through saidopenings into said sink; and devices projecting from the first-namedface of said match-plate for actuating said plungers.

In testimony whereof I have hereunto set my hand at said B'ellevillethis twelfth day of November, A. D. 1909, in the presence of the twoundersigned witnesses.

WILLIAM H. TAPHORN.

Witnesses:

IV. R. WEBER, HELEN JONES.

